On Wed, 5 Nov 2003, Pascal A. Niklaus wrote:
Hi all,
I repeatedly encounter the following problem: After importing a data set
into a data frame, I wish to set a column with numeric values to be a
factor, but can't figure out how to do this. Also, I do not wish to
write as.factor(x) all
Your problem is with scoping, not the conversion per se:
attach(ngrad)
is.factor(STNW)
[1] FALSE
At this moment, STNW is the same as ngrad$STNW
ngrad$STNW-factor(STNW) ## doesn't work
Yes it does work, try looking at is.factor(ngrad$STNW)
is.factor(STNW)
[1] FALSE
After you
